Design for a tire tread and buttress



FIG. 1 is a perspective view, partly schematic, of a tire tread and buttress showing my new design, it being understood that the pattern is repeated throughout the circumference of the tire tread and buttress, and the buttress pattern is repeated on the opposite side; and

FIG. 2 is a front elevational view, partly schematic, thereof. 

The ornamental design for a tire tread and buttress, substantially as shown and described. 